Zoom 4311 USB Adapter. Connectivity technology: Wireless, Host interface: USB. Data transfer rate (max): 3 Mbit/s. Bluetooth version: 2.0+EDR, Frequency band: 2.4835 GHz, Maximum operating distance: 100 m. Power consumption: 110 mA. Width: 29.8 mm, Depth: 72.2 mm, Height: 8.5 mm